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130 lines
4.9 KiB
130 lines
4.9 KiB
<?php
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/**
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* Performs safe variable parsing based on types which can be used by
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* users. This may not be able to represent all possible data inputs,
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* however.
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*/
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class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
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{
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/**
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* @param mixed $var
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* @param int $type
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* @param bool $allow_null
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* @return array|bool|float|int|mixed|null|string
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* @throws HTMLPurifier_VarParserException
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*/
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protected function parseImplementation($var, $type, $allow_null)
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{
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if ($allow_null && $var === null) {
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return null;
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}
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switch ($type) {
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// Note: if code "breaks" from the switch, it triggers a generic
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// exception to be thrown. Specific errors can be specifically
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// done here.
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case self::MIXED:
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case self::ISTRING:
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case self::STRING:
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case self::TEXT:
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case self::ITEXT:
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return $var;
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case self::INT:
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if (is_string($var) && ctype_digit($var)) {
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$var = (int)$var;
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}
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return $var;
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case self::FLOAT:
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if ((is_string($var) && is_numeric($var)) || is_int($var)) {
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$var = (float)$var;
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}
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return $var;
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case self::BOOL:
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if (is_int($var) && ($var === 0 || $var === 1)) {
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$var = (bool)$var;
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} elseif (is_string($var)) {
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if ($var == 'on' || $var == 'true' || $var == '1') {
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$var = true;
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} elseif ($var == 'off' || $var == 'false' || $var == '0') {
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$var = false;
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} else {
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throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
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}
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}
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return $var;
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case self::ALIST:
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case self::HASH:
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case self::LOOKUP:
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if (is_string($var)) {
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// special case: technically, this is an array with
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// a single empty string item, but having an empty
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// array is more intuitive
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if ($var == '') {
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return array();
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}
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if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
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// simplistic string to array method that only works
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// for simple lists of tag names or alphanumeric characters
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$var = explode(',', $var);
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} else {
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$var = preg_split('/(,|[\n\r]+)/', $var);
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}
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// remove spaces
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foreach ($var as $i => $j) {
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$var[$i] = trim($j);
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}
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if ($type === self::HASH) {
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// key:value,key2:value2
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$nvar = array();
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foreach ($var as $keypair) {
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$c = explode(':', $keypair, 2);
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if (!isset($c[1])) {
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continue;
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}
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$nvar[trim($c[0])] = trim($c[1]);
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}
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$var = $nvar;
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}
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}
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if (!is_array($var)) {
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break;
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}
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$keys = array_keys($var);
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if ($keys === array_keys($keys)) {
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if ($type == self::ALIST) {
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return $var;
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} elseif ($type == self::LOOKUP) {
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$new = array();
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foreach ($var as $key) {
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$new[$key] = true;
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}
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return $new;
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} else {
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break;
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}
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}
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if ($type === self::ALIST) {
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trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
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return array_values($var);
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}
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if ($type === self::LOOKUP) {
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foreach ($var as $key => $value) {
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if ($value !== true) {
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trigger_error(
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"Lookup array has non-true value at key '$key'; " .
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"maybe your input array was not indexed numerically",
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E_USER_WARNING
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);
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}
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$var[$key] = true;
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}
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}
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return $var;
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default:
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$this->errorInconsistent(__CLASS__, $type);
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}
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$this->errorGeneric($var, $type);
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}
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}
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// vim: et sw=4 sts=4
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